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Proof step 5 from proof is_obj-no-interface (conclusion)

⊦ is_obj(str, r, st) ∧ st[r -- _type] .type = mkclasstype(class) → ¬ interface∃(str, class)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 1:
⊦ is_obj(str, r, st) ↔ class+∃(str, st[r -- _type] .type .class) ∧ ¬ is_abstract(st[r -- _type] .type .class) ∧ is_obj(r, st)
Proof step 4:
st[r -- _type] .type = mkclasstype(class), interface∃(str, class), is_obj(r, st), class+∃(str, class) ⊦ is_abstract(class)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ mkclasstype(class) .class = class])]]